When closing the channel, with the stem of the wedge-shaped head on and make the ball up the valve seat seal. Before turning the ball to loosen the wedge-shaped head, followed by restoration of the original prototype Shandong ball valve between the ball and seat make small gap Weifang valve sealing surface can reduce friction and operating torque. Ball position can be divided according to their straight-channel, three-way and the right angle. After two ball valves for distribution media and change the flow of the medium. Valve installation and maintenance should note the following: 1. To leave the valve handle rotated position. 2. Can not be used as throttling. 3. Ball belt drive mechanism should be installed upright. V-pneumatic valve characteristics and uses a pneumatic piston actuator using compressed air as a power source V-ball manufacturers, driven by the movement of the piston crank 90 degrees rotation, to automatically open and close the valve. It's part of: adjusting screw actuator box, crank, cylinder block, cylinder shaft, piston, connecting rod, cardan shaft. 2, pneumatic control valve works: pneumatic valve actuators and regulation by agencies. Actuator is adjustable thrust components V-ball valve, which according to the size of the control signal to produce a corresponding pressure thrust, push adjusting mechanism action. Pneumatic control valve is a valve regulating member, it is in direct contact with the regulating medium, adjusting the flow rate of the fluid. Shandong valve | V-type valve | valve model provided by Everbright Everbright Valve Co., Ltd., Shandong. Valve Co., Ltd. Shandong China Everbright (www.sdgdfm.com) strong, credible, Shandong Weifang ball industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Everbright valve into the brilliant and you work for a better future!